JP2595733B2 - Task error detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] Regarding a task abnormality detection method in an information processing system that executes a plurality of tasks, an object of the present invention is to detect a termination abnormal task quickly and reliably, Task activation history information setting means for recording activation history information indicating that the task has been activated within a period; task termination history information setting means for recording termination history information indicating that each task has been terminated within a predetermined period; The task start history information setting means and the task termination history information setting means are monitored for each period, and if any of the task activation history information and the task termination history information is not recorded,
A task abnormality detecting means for detecting an abnormality of the task is provided.

[Industrial applications]

The present invention relates to a task abnormality detection method in an information processing system that executes a plurality of tasks.

For example, in an information processing system such as an electronic exchange,
For example, in order to execute various processes such as a subscriber off-hook and on-hook monitoring process and a dial pulse receiving process, a plurality of tasks corresponding to each process are provided, and are activated and executed at a predetermined cycle. You.

[Conventional technology]

FIG. 6 is a diagram showing an example of a conventional information processing system, FIG. 7 is a diagram showing an example of a task starting process in FIG. 6, and FIG. 8 is an example of a task ending process in FIG. FIG. 9 is a diagram showing an example of a process of detecting an abnormal startup task in FIG. 6, and FIG.
FIG. 9 is a diagram showing an example of a task start / end situation in the figure.
(A) shows a case where both startup and termination are normal, (b) shows a case where termination is abnormal, and (c) shows a case where the termination abnormality and the startup abnormality overlap.

In FIG. 6, the information processing system includes a processing unit 1 for executing various processes, a storage unit 2 for storing various information required for the processing unit 1 to execute various processes, and a processing state of the information processing system. And a terminal device 3 for outputting various messages for notifying the maintenance person or the like.

Further, the processing unit 1 includes a plurality of tasks 11 (each task is referred to as 11 _{A to} 11 _N , the same applies hereinafter) executed when the information processing system implements various processes, and Time point T ₁ arranged at p (for example, for 4 ms)
To a task activation unit 12 (the proviso i to 1 to X) predetermined time T _i in T _X is started, the task terminator 13 which terminates the task 11 has reached the termination stage, a predetermined period of time P (e.g., 3 minutes ), A startup abnormal task detection unit 14 for monitoring the activation state of each task 11, a system restart activation unit 15, and a message output unit 16 are provided. 1 is an operation bit a for identifying whether or not each task 11 is an execution target (a logic “1” when the task 11 is an execution target;
If not executed the operation task identification area (ACT) 21 which stores set to logic "0"), activation bit b indicating when T _i should be activated each task 11 (When starting a logic "1" And an activation schedule area (SDL) 22 for storing a logic “0” when the activation is not performed.

The boot history setting area (ST) provided in the storage unit 2
H) Each boot history bit c stored in 23 and each boot abnormal bit d stored in the boot abnormal task setting area (STF) 24 are set to logic "0" in the initial state. I do.

In FIGS. 6 to 9 and FIG.
After the information processing system is initialized at t _1, when the task activation unit 12 in the processing unit 1 is started at predetermined time intervals p, running task identification area (AC provided in the storage unit 2
T) 21 and the activation schedule area (SDL) 22, the operation bit a _I (where I is any of A to N) is set to logic “1”, and the current time T _a (where a is 1 to Any of X)
Start bit b _Ia extracts the task 11 _I which is set to a logic "1" as the start target task (FIG. 7 step S11), and extracted task 11 after starting the _I in (step
S12), activation task 11 _I in the activation history setting area (STH) 23
The corresponding activation history bit c _I To set to logic "1" (step S13).

After the activated task 11 _I performs a predetermined process, the time T
_{When the} termination stage reaches _a ', the task termination unit 13 is activated.

The activated task terminator 13 terminating a task 11 _I (FIG. 8 step S21).

Further again the task activation unit 12 at time T _b starts a task 11 _I, Although task terminator 13 at time T _b 'to terminate the task 11 _I, boot history bit c _I is set to a logic "1" You will be left alone.

Meanwhile activation abnormality task detection unit 14 is activated from the time t ₁ to time period P elapsed time t ₂ later with reference to working tasks identification area (ACT) 21 of the storage unit 2, the operating bit a _I is a logic "1" The task 11 _I set in ( ₁₎ is extracted (step S31 in FIG. 9),
Then referring to the execution history setting area (STH) 23, analyzes the logical value of the execution history bits c _I corresponding to the task 11 _I extracted from the operating task identification area (ACT) 21 (step S32),
Start the history bit c _I is detected that it is set to a logic "1" (step S33), it determines that the task 11 _I is successfully started within a period P from the time point t ₁ until time t _2, activated the execution history setting area (STH) 23 the start-up abnormality of bits d _I corresponding to the task 11 _I abnormal task setting area (STF) 24 as a as one likes the logic "0" is initially set (step S35), further activated abnormal task Startup error bit d with reference to the setting area (STF) 24
Is searched for the presence / absence of the task 11 whose is set to logic "1" (step S36), and all the startup abnormality bits d are set to logic "0".
Is detected (step S37),
It is determined that there is no startup abnormal task, and the operation ends.

Also in the period P from the time point t ₃ to time t _4, the same process is performed.

Next, in FIGS. 6 to 9 and FIG. 10 (b),
In task activation unit 12 is similar to the above, the task at time T _a
When 11 _I is activated and the activation history bit c _I is set to logic “1” (steps S11 to S13 in FIG. 7), it is assumed that the task 11 _I has an abnormal termination and remains activated.

In this state, when the start-up abnormality of the task detection unit 14 at time t ₂ after a period P has elapsed from the time t ₁ is started, operated in the same manner as described above task identification area (ACT) 21 and boot history setting area (S
TH) 23, the activation history bit c corresponding to task 11 _{I
When I} detects that I is set to logic “1” (No. 9
FIG steps S31 to S33), the task 11 _I time from the time point t ₁ is t
Determined to have been successfully start within a period of up to ₂ P, boot history setting area startup abnormal bits d _I corresponding to start-up abnormality of the task setting area (STF) 24 task 11 _I as as one likes the logic "0" ( STH) 23 is initialized (step S35), and all the startup error bits d in the startup error task setting area (STF) 24 are set.
When it is detected that is set to logic “0” (step S37), it is determined that there is no startup abnormal task, and the operation is terminated.

At time t ₂ later, the task activation unit 12 attempts to start the task 11 _I at time Tc but, task 11 _I because it has continued active state, and ends the operation without starting the task 11 _I, started The history bit c _I also remains set to logic “0”.

In this state, start-up abnormality of the task detection unit 14 from time t ₂ to time period P has elapsed after the time t ₃ of is activated, when taken in conjunction with the operation disk identification area (ACT) 21 and boot history setting area (STH) 23, When detecting that the activation history bit c _I is set to logic “0” (steps S31 to S33 in FIG. 9), the task 11 _I is determined to be abnormal, and the activation abnormal task setting area (S
After setting the startup error bit d _I in the TF) 24 to logic “1” (step S34) and initializing the startup history setting area (STH) 23 (step S35), the startup error task setting area (STF) 24
It detects that there is a task 11 _I whose activation abnormality bit d _I is set to logic “1” in the data, determines that an activation abnormality task exists, and activates the system restart activation unit 15 (steps S36 to S38). ).

The activated system restart activation unit 15 eliminates all abnormal tasks by initializing the information processing system after saving the information on the abnormal activation task 11 _I detected by the abnormal activation task detection unit 14. .

Further, the message output unit 16 outputs a message indicating the startup abnormal task 11 _I saved by the system restart activation unit 15 to the terminal device 3.

Further, in FIGS. 6 to 9 and FIG. 10 (c),
Task activation unit 12 refers to the operation task identification area (ACT) 21 and starts scheduled region (SDL) 22, the start time point T _a in task 11 _I and 11 _J (where J is J ≠ I by A to N) attempts (FIG. 7 step S11 and S12), the task 11 _I is started becomes untoward, when task 11 _J did not start the activating abnormal, the boot history bits c _I corresponding to the task 11 _I logic Set to “1” (step S1
3) execution history bit c _J logic corresponding to the task 11 _J "0"
Will remain as set.

In this state, when the start-up abnormality of the task detection unit 14 at time t ₂ after a period P has elapsed from the time t ₁ is started, operated in the same manner as described above task identification area (ACT) 21 and boot history setting area (S
TH) 23, when it is detected that the activation history bit c _I is set to logic “1” but the activation history bit c _J is set to logic “0” (FIG. 9, steps S31 to S31) S33),
Task 11 _J determines that the start is abnormal, and the start abnormal bit d _J corresponding to task 11 _J in the start abnormal task setting area (STF) 24
The after setting to logic "1" (step S34), the execution history setting area (STH) 23 initializes (step S35), further activated abnormal task setting area (STF) started within 24 abnormal bit d _J
When it detects that there is a task _11J whose is set to logic “1” (step S37), it determines that there is a startup abnormal task, and activates the system restart activation unit 15 (step S38).

The activated system restart activation unit 15 saves information on the abnormal activation task 11 _J detected by the abnormal activation task detection unit 14 and then initializes the information processing system, thereby not only the abnormal activation task 11 _J but also the abnormal activation task 11 _J Termination abnormal task 11 _{I is} also resolved.

The message output unit 16, a message indicating activation abnormal task 11 _J of system restart activation unit 15 is retracted, but output to the terminal device 3 a message indicating untoward task 11 _I is not output.

[Problems to be solved by the invention]

More As is apparent from the description, in some prior art information processing systems, as one likes invoked at time T _a, can not be detected in the time t ₂ the detection of untoward and since task 11 _I, after further period P time t ₃ to be be detected as an abnormal activation (FIG. 10 (b)), the other tasks 11 _J became abnormal boot further time T _a is detected, the information processing system at time t ₂ there order to be initialized, were as one likes invoked at time T _a, untoward and since task 11 undetectable become problems _I have.

An object of the present invention is to enable quick and reliable detection of a termination abnormal task.

[Means for solving the problem]

 FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, reference numeral 100 denotes an information processing system to which the present invention is applied, and 11 denotes a plurality of tasks executed by the information processing system 100.

Reference numeral 200 denotes a task activation history information setting unit provided in the information processing system according to the present invention.

Reference numeral 300 denotes a task termination history information setting unit provided in the information processing system according to the present invention.

Reference numeral 400 denotes a task abnormality detection unit provided in the information processing system according to the present invention.

[Action]

The task activation history information setting means 200 defines each task 11 as
The boot history information indicating that the boot has been performed within a predetermined period is recorded.

The task termination history information setting means 300
The termination history information indicating that the termination has been completed within a predetermined period is recorded.

The task abnormality detection means 400 monitors the task activation history information setting means 200 and the task termination history information setting means 300 every predetermined period, and when any of the task activation history information and the task termination history information is not recorded, It is assumed that an abnormality of the task is detected.

Therefore, not only the startup abnormal task that occurs within the predetermined period but also the termination abnormal task is detected, and the detection delay and undetection of the termination abnormal task are eliminated, and the reliability of the information processing system is improved.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Second
FIG. 3 is a diagram showing an information processing system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of a task termination process in FIG. 2, and FIG. 4 is a process for detecting a termination abnormal task in FIG. FIG. 5 is a diagram showing an example of the task activation / termination status in FIG. 2; FIG. 5A shows a case where activation and termination are both normal; FIG.
(C) shows a case of a startup abnormality. The same reference numerals indicate the same objects throughout the drawings.

In FIG. 2, the information processing system shown in FIG.
A task activation unit 12 for executing a task activation process shown in FIG. 7 as a task activation history information setting means 200 in FIG. And boot history setting area (STH) 23
A task termination unit 13 'for executing the task termination process shown in FIG. 3 as the task termination history information setting means 300 in FIG. 1, and a termination history setting area (SP
H) 25 is provided, and the abnormal start task detecting section 14 executes the abnormal start task detecting step shown in FIG. 9 as the abnormal task detecting means 400 in FIG. 1, and the abnormal end task detecting step shown in FIG. , A termination abnormal task setting area (STF) 24 and a termination abnormal task setting area (SPF) 26 are provided.

Also in FIG. 2, the operation task identification area (ACT) 21 is operated bit a is stored for each task 11, also in the power-on schedule region (SDL) 22 corresponding to each task 11 and each time point T _i A start bit b is stored, and a storage bit of a start history setting area (STH) 23, a start abnormal task setting area (STF) 24, a termination history setting area (SPH) 25, and a termination abnormal task setting area (SPF) 26 Are initially set to logic "0" in the initial state.

In FIGS. 2 to 4 and FIG.
After the information processing system is initialized at t _1, the task activation unit 12 in the processing unit 1, in the same manner as described above, when it is started every predetermined time intervals p, running task identification area in the storage unit 2 (ACT) 21 and starts with reference to the schedule area (SDL) 22, after activated by extracting the time point T _a task 11 _I as an activation object (FIG. 7 step S11 and S12), execution history setting area (STH ) the execution history bits c _I corresponding to starting task 11 _I of 23 is set to a logic "1" (step S13).

After the activated task 11 _I performs a predetermined process, the time T
_a 'to reach the termination phase, the task termination portion 13' when you start, after the task termination portion 13 'that ended the task 11 _I (Fig. 3 step S41), termination of termination history setting area (SPH) 25 termination history bits e _I corresponding to the task 11 _I is set to a logic "1" (step S42).

Further again the task activation unit 12 at time T _b starts a task 11 _I, Although 'the task terminator 13' when T _b is terminated a task 11 _I, boot history bit c _I and termination history bits e _I is In either case, the logic remains at “1”.

The time t ₂ that period has P elapsed from the time t _1, start-up abnormality of the task detection unit 14 and the untoward task detection unit 17 is activated.

The activated abnormal task detection unit 14 refers to the active task identification area (ACT) 21 and the activation history setting area (STH) 23 in the same manner as described above, and sets the active bit a _I to logic “1”. The logic value of the boot history bit c _I corresponding to the task 11 _I is analyzed (steps S31 and S32 in FIG. 9), and when it is detected that the boot history bit c _I is set to logic “1” (step S33). , determines that within a period P from the time point t ₁ until time t ₂ task 11 _I starts successfully, the start-up abnormality of bits d _I corresponding to the task 11 _I of start-up abnormality of the task setting area (STF) 24 logic Boot history setting area (STH) 23 as “0”
Are initialized (step S35), and the presence or absence of a task 11 whose startup abnormality bit d is set to logic "1" is searched by referring to the startup abnormality task setting area (STF) 24 (step S36). When it is detected that all the startup abnormality bits d are set to logic "0" (step S37), it is determined that there is no startup abnormality task, and the operation is terminated.

On the other hand, the termination abnormal task detecting unit 17 refers to the active task identification area (ACT) 21 and extracts the task 11 _{I in} which the corresponding active bit a _I is set to logic “1” (step S51 in FIG. 4). ) Then, referring to the termination history setting area (SPH) 25, the task 1 extracted from the active task identification area (ACT) 21
The logic value of the termination history bit e _I corresponding to 1 _I is analyzed (step S52), and when it is detected that the termination history bit e _I is set to logic “1” (step S53), the time from time t ₁ to time task 11 _I within the period P until t ₂ is determined to have ended normally, the untoward bit f _I corresponding to the task 11 _I of untoward task setting area (SPF) 26 as a as one likes logic "0" Initialize the termination history setting area (SPH) 25 (step S55), and further refer to the termination abnormal task setting area (SPF) 26 to determine whether there is a task 11 whose termination abnormal bit f is set to logic "1". A search is performed (step S56), and when it is detected that all the startup abnormality bits d are set to logic “0” (step S56)
S57), it is determined that there is no termination abnormal task, and the operation ends.

Even in the period P, from time t ₃ to time t _4, the same process is performed.

Next, in FIG. 2 to FIG. 4 and FIG.
Task activation unit 12 task 11 at time T _a in the same manner as described above
_{When I} is activated and the activation history bit c _I is set to logic “1”, if the task 11 _I becomes abnormally terminated and remains activated, the task termination section 13 ′ is not activated, and therefore terminated. history bits e _I also become as one likes, which is set to a logic "0".

In this state, start-up abnormality of the task detection unit 14 and the untoward task detection unit 17 at time t ₂ after a period P has elapsed from the time t ₁ is started, the start-up abnormality of the task detection unit 14 in the same manner as described above, a task 11 _I Upon detecting that the corresponding boot history bit c _I is set to logic "1" (steps S31 through S31 in FIG. 9).
33), task 11 _I was determined that was successfully started within a period P from the time point t ₁ until time t _2, start-up abnormality of the task setting area (ST
F) Although the activation abnormal bits d _I in 24 is set to a logic "0" as one likes, untoward task detection unit 17, setting termination history bits e _I corresponding to the task 11 _I is a logic "0" When it detects a being (Fig. 4 step S53), it determines that the task 11 _I is abnormal termination, untoward task setting area (SP
F) After setting the termination abnormal bit f _I corresponding to the task 11 _I in 26 to logic “1” (step S54), the termination history setting area (SPH) 25 is initialized (step S55), and the termination abnormality is further performed. Referring to the task setting area (SPF) 26, the termination abnormal bit f
There searching whether the task 11 is set to a logic "1" (step S56), starts the abnormality bits d ₁ detects that task 11 exists which is set to a logic "1" (step S57) Then, it is determined that the termination abnormal task _11I exists, and the system restart activation unit 15 is activated (step S58).

The activated system restart activation unit 15 eliminates the abnormal termination task 11 _I by saving information on the abnormal termination task 11 _I detected by the abnormal termination task detection unit 14 and then initializing the information processing system. .

The message output unit 16 outputs to the terminal device 3 a message indicating the abnormal termination task 11 _I saved by the system restart activation unit 15.

Next, in FIG. 2 to FIG. 4 and FIG.
If the task 11 task activation unit 12 attempts to start at time T _a in the same manner as described above _I did not start with an abnormal activation, activation history bit c _I become as one likes, which is set to a logic "0", also The task termination unit 13 is not activated, and the termination history bit
e _I also remains set to logic “0”.

In this state, when the start-up abnormality of the task detection unit 14 and the sintering abnormality task detection unit 17 at time t ₂ after a period P has elapsed from the time t ₁ is started, start-up abnormality of the task detection unit 14 in the same manner as described above operational tasks Referring to the identification area (ACT) 21 and the boot history setting area (STH) 23, when detecting that the boot history bit c _I is set to logic “0” (steps S31 to S33 in FIG. 9), the task 11 Determines that the startup error has occurred, sets the startup error bit d _I corresponding to task 11 _I in the startup error task setting area (STF) 24 to logic “1” (step S34), and then sets the startup history setting area (STH) Initialize 23 (Step S3
5) Further, when it is detected that there is a task 11 _I whose startup abnormality bit d _I is set to logic “1” in the startup abnormality task setting area (STF) 24 (step S37), the activation abnormality task exists. Then, it is determined that the system restart activation unit 15 is activated (step S38).

The activated system restart activation unit 15 initializes the information processing system after saving information on the activation abnormal task detected by the activation abnormal task detection unit 14,
To eliminate the start-up abnormality of task 11 _I.

Further, the message output unit 16 outputs a message indicating the startup abnormal task 11 _I saved by the system restart activation unit 15 to the terminal device 3.

When the termination abnormal task detection unit 17 detects that the termination history bit e _I is set to logic “0” with reference to the active task identification area (ACT) 21 and the termination history setting area (SPH) 25, It operates in the same process as described above (steps S51 to S58 in FIG. 4).

As apparent from the above description, start-up abnormality of the task according to the present embodiment, generated in the period of time t ₁ to t ₂ P
11 _I and the abnormal termination task 11 _I are at the end of the period P
is reliably detected at t _2, the information processing system is initialized, so that the output a message indicating the abnormal condition to the terminal device 3.

2 to 5 are merely examples of the present invention. For example, the configuration of the information processing system is not limited to the illustrated one, and many other modifications are considered. However, the effect of the present invention does not change in any case.

〔The invention's effect〕

As described above, according to the present invention, in the information processing system, not only a startup abnormal task occurring within a predetermined period,
The abnormal termination task is also detected, so that the detection delay and undetection of the abnormal termination task are eliminated, and the reliability of the information processing system is improved.

[Brief description of the drawings]

1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an information processing system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of a task termination process in FIG. 2, and FIG. Is the second
FIG. 5 is a diagram showing an example of a termination abnormal task detection process in FIG. 5, and FIG. 5 is a diagram showing an example of a task activation / termination status in FIG. 2; FIG. 6 shows an example of a conventional information processing system, FIG. 7 shows an example of a task starting process in FIG. 6, and FIG. Is a diagram showing an example of a task termination process in FIG. 6, and FIG.
FIG. 10 is a diagram showing an example of a process of detecting an abnormal start task in FIG. 6, and FIG. 10 is a diagram showing an example of a task start / end situation in FIG. 6. FIG.
(B) shows the case where the termination abnormality occurs, and (c) shows the case where the termination abnormality and the startup abnormality overlap. In the figure, 1 is a processing unit, 2 is a storage unit, 3 is a terminal device,
11 is a task, 12 is a task start unit, 13 and 13 'are task termination units, 14 is a startup abnormal task detection unit, 15 is a system restart activation unit, 16 is a message output unit, 17 is a termination abnormal task detection unit, 21 is Active task identification area (ACT), 22 is the start schedule area (SDL), 23 is the start history setting area (STH),
24 is a startup abnormal task setting area (STF), 25 is a termination history setting area (SPH), 26 is a termination abnormal task setting area (SPF),
100 denotes an information processing system, 200 denotes a task activation history information setting unit, 300 denotes a task termination history information setting unit, and 400 denotes a task abnormality detection unit.

Claims (1)

(57) [Claims] 1. An information processing system (100) for executing a plurality of tasks (11), a task activation history information setting for recording activation history information indicating that each of the tasks (11) has been activated within a predetermined period. Means (200); task termination history information setting means (300) for recording termination history information indicating that each task (11) has been terminated within a predetermined period; and task activation history information for each predetermined period. Setting means (20
0) and the task termination history information setting means (300) are monitored, and if any of the task activation history information and the task termination history information is not recorded, it is determined that a task abnormality has been detected. Means (400) for providing a task abnormality detection method.